CN110395031A - A kind of fresh transport being folded without breaking bag film and preparation method thereof of double-layer structure - Google Patents
A kind of fresh transport being folded without breaking bag film and preparation method thereof of double-layer structure Download PDFInfo
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- CN110395031A CN110395031A CN201910306916.2A CN201910306916A CN110395031A CN 110395031 A CN110395031 A CN 110395031A CN 201910306916 A CN201910306916 A CN 201910306916A CN 110395031 A CN110395031 A CN 110395031A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Packages (AREA)
- Wrappers (AREA)
Abstract
The present invention provides a kind of being folded without breaking bag film and preparation method thereof of fresh transport double-layer structure, its main feature is that bag film internal layer is using calper calcium peroxide as filler, outer layer is using calcium carbonate as filler, using polyolefin as matrix resin, sequentially add modifying agent, toughener, other auxiliary agents, the extruding pelletization in double screw extruder.The masterbatch pellet of acquisition is placed in double-layer coextrusion inflation film manufacturing machine and prepares film.Bag film internal layer of the present invention utilizes the unique physicochemical property of calper calcium peroxide, the carbon dioxide that the metabolism of fish and shrimp living body is released both can be absorbed, while slow release oxygen maintains dissolved oxygen in water, and itself is nontoxic, at low cost.Bag film integrally uses double-layer structure, using ultra-low density polyethylene as toughener, while preventing leak, effectively improves the intensity and toughness of bag film.Bag film prepared by the present invention, than common fresh bag for, more resistant to puncture, fresh survival rate to significantly improve in the fresh transportational process of living body.
Description
Technical field
The present invention relates to a kind of preparation methods of functional plastic film, and in particular to double-layer structure is used in the fresh transport of one kind
Being folded without breaking bag film preparation method.
Background technique
It transports for long-distance for fish and shrimp living body, is enclosed in small space, transport fish and shrimp living body density is big, and oxygen demand is fast.
For water fish living body of shrimp, dissolved oxygen, which need to be greater than 4mg/L, just can guarantee its normal vital movement.Therefore, in order to guarantee to transport
Survival rate during defeated improves the dissolved oxygen amount of water body in fresh bag, presently mainly periodically injects oxygen in common fresh bag
Gas with keep fish and shrimp living body in a limited space in have enough oxygen.Thus there are problems that two: 1. due to timing
Oxygen is injected into bag film, in transit, increases human cost；2. injecting oxygen, bag film volume expansion is occupied
Limited transport space, while the weight that oxygen equipment increases transport vehicle is beaten, virtually substantially increase the cost of transport.
On the other hand, common fresh bag polyethylene film is very thin, limited load bearing capacities or easily be punctured etc. due to, currently
Most of fresh bag is served only for transporting small-sized ornamental fish or fry in the market, for larger fish, the fishes and shrimps with hard spine or thorniness
All less use.Therefore in the use scope for promoting fresh bag, production cost is reduced, exploitation thickens the fresh bag with being folded without breaking
It is a problem to be solved.
Calper calcium peroxide has unique physicochemical property, the carbon dioxide that the metabolism of fish and shrimp living body is released both can be absorbed, together
When slow release oxygen maintain fish and shrimp living body be suitable for environmental condition during transportation, and it is nontoxic in itself, it is at low cost；
Ultra-low density polyethylene (ULDPE) unique properties, referred to as polyolefin elastomer have molecule chain space greatly and crystallinity are low,
The features such as toughness and good elasticity, and other opposite toughener, have very well with other polyolefin resins and perhaps various fillers
Compatibility, assign film more preferably toughness and puncture resistance.
Therefore, bag film of the present invention uses calper calcium peroxide for internal layer filler, and ultra-low density polyethylene is film toughener, leads to
Preferred Suitable formulations are crossed, design membrane structure, accurate temperature controlling rate controlling, preferably screw rod composition, these synergistic effects are lower to be reduced by mistake
Degradation of the calcium oxide to polyolefin substrate, the fresh bag thin-film material self-absorption carbon dioxide, slow release oxygen, toughness
Height, Product Green is environmentally friendly, at low cost, and the market competitiveness is strong, while preparation process is simple, production process cleaning, applied widely.
Summary of the invention
To overcome deficiency existing for existing common fresh bag, being folded without breaking ability and the fish and shrimp living body for improving fresh bag are long-distance
The survival rate of transport, the purpose of the present invention is to provide a kind of preparation sides of the being folded without breaking bag film of fresh transport double-layer structure
Method.
In order to achieve the object of the present invention the technical solution adopted is that:
1. the being folded without breaking bag film that double-layer structure is used in a kind of fresh transport, it is characterised in that comprising made of different masterbatch
Internal layer and outer membrane, the masterbatch use following component and raw material proportioning:
(1) film inner layer masterbatch: 10~30 parts by weight of calper calcium peroxide, 0.05~0.2 parts by weight of modifying agent, 1~3 weight of PE wax
Amount part, 1~3 parts by weight of stearic acid, 5~10 parts by weight of toughener, 37.66~58.065 parts by weight of linear low density polyethylene,
16.14~24.885 parts by weight of low density polyethylene (LDPE)；
(2) film outer layer masterbatch: 10~30 parts by weight of calcium carbonate, 0.1~0.3 parts by weight of modifying agent, 1~3 weight of PE wax
Part, 1~3 parts by weight of stearic acid, 5~10 parts by weight of toughener, 37.59~58.03 parts by weight of linear low density polyethylene are low
16.11~24.87 parts by weight of density polyethylene.
2.. a kind of preparation method of the being folded without breaking bag film of fresh transport double-layer structure, it is characterised in that including following
Step:
(1) masterbatch is granulated:
Filler material is heated to 110 ± 10 DEG C of temperature in super mixer by weight, after being mixed 2 hours, filling
Expect that moisture control less than 0.3%, sequentially added modifying agent, PE wax, stearic acid, toughener at interval of 5 minutes in order, is added
After continue stirring 30 minutes, then be added linear low density polyethylene, low density polyethylene (LDPE), be granulated in double screw extruder；
The control of twin-screw extruder barrel temperature is in 130~140 DEG C of Ith area, 150~155 DEG C of IIth area, III area 160 during squeezing out pelletizing
~165 DEG C, 170~175 DEG C of IVth area, 160~165 DEG C of Vth area, 160~165 DEG C of die head；Prepare the extruder spiral shell of film inner layer masterbatch
Bar revolving speed is 100~200 r/min, and the extruder screw revolving speed for preparing film outer layer masterbatch is 200~500r/min.(2) it is blow molded
Bag making: preparing masterbatch pellet for step (1) and be respectively placed in double-layer coextrusion inflation film manufacturing machine, and film inner layer masterbatch is placed in A machine barrel, film outer layer
Masterbatch is placed in B machine barrel, and the control of twin-screw extruder barrel temperature is in 130~140 DEG C of Ith area, II area 170~175 during blown film
DEG C, 180~185 DEG C of IIIth area, 190~195 DEG C of IVth area, 200~205 DEG C of Vth area, flange 200~205,200~205 DEG C of die head,
Wherein A machine barrel revolving speed is 100~200r/min, and B machine barrel revolving speed is 200~500r/min, is blow molded and makes through double-layer coextrusion inflation film manufacturing machine
Standby thin-film material, then through Bag Making Machine bag making.
2. calper calcium peroxide active constituent content described in is 50%~60%, and mesh number is not less than 1250 mesh.
Modifying agent described in 3. are as follows: the combination of sophorolipid, rhamnolipid, seaweed glycolipid or their arbitrary proportions.
Modifier content described in 4. are as follows: the 0.5%~0.7% of calper calcium peroxide additive amount.
Toughener described in 5. are as follows: ultra-low density polyethylene.
Linear low density polyethylene mass fraction described in 6.: low density polyethylene (LDPE) mass fraction=7:3.
Bag film internal layer thickness described in 7.: outer layer thickness=1:1~1:3.
8. calper calcium peroxide is placed in film inner layer, internal layer the beneficial effects of the present invention are: 1. film integrally uses double-layer structure
Both the carbon dioxide that the metabolism of fish and shrimp living body is released can be absorbed, while slow release oxygen maintains dissolved oxygen in water, outer layer is assigned
Give film anti-leakage and being folded without breaking ability；2. using ultra-low density polyethylene for the toughener of polyolefin film, with matrix resin
Compatibility is good, improves the being folded without breaking ability of film, and its molecule chain space is big and crystallinity is low, gas permeation rate is big, is conducive to
Oxygen and carbon dioxide exchange in film；3. the cost of material of calper calcium peroxide and calcium carbonate be matrix resin cost five/
One, use the cost for reducing film.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
Test method:
Film thickness is directly tested with micrometer caliper；
Dissolved oxygen amount: the Co., Ltd TP251 dissolved oxygen analytic instrument direct-reading of prosecution equipment is newly tieed up using Beijing epoch；
Survival rate: Fujian Province village sky material Science and Technology Ltd. company standard Q/ZHCL 001-2018 " fresh bag " is used
Test.
Embodiment 1
Masterbatch is granulated
Film inner layer masterbatch: calper calcium peroxide 10kg is heated to 110 ± 10 DEG C of temperature in super mixer, is mixed 2 hours
Afterwards, sophorolipid 0.05kg, PE wax 1kg, stearic acid 1kg, ultra-low density polyethylene 5kg were sequentially added at interval of 5 minutes in order,
Continue stirring 30 minutes after addition, linear low density polyethylene 58.065kg, low density polyethylene (LDPE) 24.885kg be then added,
It is granulated in double screw extruder.The control of twin-screw extruder barrel temperature is in 130 DEG C of Ith area, II area 155 during extruding pelletization
DEG C, 165 DEG C of IIIth area, 170 DEG C of IVth area, 165 DEG C of Vth area, 160 DEG C of die head, screw speed 150r/min.
Film outer layer masterbatch: calcium carbonate 30kg is heated to 110 ± 10 DEG C of temperature in super mixer, is mixed 2 hours
Afterwards, sophorolipid 0.3kg, PE wax 3kg, stearic acid 3kg, ultra-low density polyethylene 10kg were sequentially added at interval of 5 minutes in order,
Continue stirring 30 minutes after addition, linear low density polyethylene 37.59kg, low density polyethylene (LDPE) 16.11kg is then added, in
It is granulated in double screw extruder.The control of twin-screw extruder barrel temperature is in 130 DEG C of Ith area, II area 155 during squeezing out pelletizing
DEG C, 165 DEG C of IIIth area, 170 DEG C of IVth area, 165 DEG C of Vth area, 160 DEG C of die head, screw speed 200r/min.
(2) it is blow molded bag making:
The masterbatch pellet of step (1) is respectively placed in double-layer coextrusion inflation film manufacturing machine, film inner layer masterbatch is placed in A machine barrel, outside film
Layer masterbatch is placed in B machine barrel, and the control of twin-screw extruder barrel temperature is in 130 DEG C of Ith area, 170 DEG C of IIth area, IIIth area during blown film
180 DEG C, 195 DEG C of IVth area, 205 DEG C of Vth area, flange 203,200 DEG C of die head, A machine barrel revolving speed is 150r/min, and B machine barrel revolving speed is
200r/min；Thin-film material is prepared through double-layer coextrusion inflation film manufacturing machine blow molding, wherein film internal layer thickness: outer layer thickness=1:3, then
Fresh bag is made through Bag Making Machine.
Using fresh bag prepared by the present invention, with common fresh bag in the transport of nine section shrimps breakage rate, survival rate and molten
Oxygen amount is compared (such as table 1), is significantly improved using the survival rate of fresh bag prawn prepared by the present invention.
1 fresh bag of performance test results of table
Embodiment 2
(1) masterbatch is pelletized
Film inner layer masterbatch: calper calcium peroxide 30kg is heated to 110 ± 10 DEG C of temperature in super mixer, is mixed 2 hours
Afterwards, rhamnolipid 0.15kg, PE wax 3kg, stearic acid 3kg, ultra-low density polyethylene were sequentially added at interval of 5 minutes in order
10kg continues stirring 30 minutes after addition, linear low density polyethylene 37.695kg, low density polyethylene (LDPE) is then added
16.155kg is granulated in double screw extruder.The control of twin-screw extruder barrel temperature is in I area 130 during squeezing out pelletizing
DEG C, 155 DEG C of IIth area, 165 DEG C of IIIth area, 170 DEG C of IVth area, 165 DEG C of Vth area, 160 DEG C of die head, screw speed 150r/min.
Film outer layer masterbatch: calcium carbonate 30kg is heated to 110 ± 10 DEG C of temperature in super mixer, is mixed 2 hours
Afterwards, rhamnolipid 0.3kg, PE wax 3kg, stearic acid 3kg, ultra-low density polyethylene were sequentially added at interval of 5 minutes in order
10kg continues stirring 30 minutes after addition, linear low density polyethylene 37.59kg, low density polyethylene (LDPE) is then added
16.11kg is granulated in double screw extruder, and the control of twin-screw extruder barrel temperature is in I area 130 during squeezing out pelletizing
DEG C, 155 DEG C of IIth area, 165 DEG C of IIIth area, 170 DEG C of IVth area, 165 DEG C of Vth area, 160 DEG C of die head, screw speed 200r/min
(2) it is blow molded bag making:
The masterbatch pellet of step (1) is respectively placed in double-layer coextrusion inflation film manufacturing machine, film inner layer masterbatch is placed in A machine barrel, outside film
Layer masterbatch is placed in B machine barrel, and the control of twin-screw extruder barrel temperature is in 130 DEG C of Ith area, 170 DEG C of IIth area, IIIth area during blown film
180 DEG C, 195 DEG C of IVth area, 205 DEG C of Vth area, flange 203,200 DEG C of die head, A machine barrel revolving speed is 150r/min, and B machine barrel revolving speed is
200r/min；Thin-film material is prepared through double-layer coextrusion inflation film manufacturing machine blow molding, wherein film internal layer thickness: outer layer thickness=1:3, then
Fresh bag is made through Bag Making Machine.
Using fresh bag prepared by the present invention, with common fresh bag breakage rate, survival rate and dissolved oxygen in the transport of grass carp
Amount is compared (such as table 2), is significantly improved using fresh bag prepared by the present invention to the survival rate of grass carp.
2 fresh bags of performance test results of table
Conclusion: the present invention is in the suitable raw material proportioning of the suitable raw material of design double-layer structure, selection, setting, operating procedure
Optimization, i.e., addition calper calcium peroxide and ultra-low density polyethylene, limit accurately setting for suitable raw material parts and operating parameter
It sets, under the mutual cooperation effect of above-mentioned raw materials and operating procedure, obtains thin-film material that is at low cost, haveing excellent performance, improve
The survival rate of fish and shrimp living body in fresh transportational process, lacking any link and all making packaging material in some aspects has not
With the decrease of degree.Thin-film material Product Green of the invention is environmentally friendly, the market competitiveness is strong, while preparation process is simple, production
Process cleans, it is applied widely.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (8)
1. the being folded without breaking bag film that double-layer structure is used in a kind of fresh transport, it is characterised in that include the internal layer made of different masterbatch
And outer membrane, the masterbatch use following component and raw material proportioning:
(1) film inner layer masterbatch: 10~30 parts by weight of calper calcium peroxide, 0.05~0.2 parts by weight of modifying agent, 1~3 parts by weight of PE wax,
1~3 parts by weight of stearic acid, 5~10 parts by weight of toughener, 37.66~58.065 parts by weight of linear low density polyethylene, low-density
16.14~24.885 parts by weight of polyethylene；
(2) film outer layer masterbatch: 10~30 parts by weight of calcium carbonate, 0.1~0.3 parts by weight of modifying agent, 1~3 parts by weight of PE wax are stearic
Sour 1~3 parts by weight, 5~10 parts by weight of toughener, 37.59~58.03 parts by weight of linear low density polyethylene, low density polyethylene
16.11~24.87 parts by weight of alkene.
2. a kind of preparation method of the being folded without breaking bag film of fresh transport double-layer structure, it is characterised in that the following steps are included:
(1) masterbatch is granulated:
Filler material is heated to 110 ± 10 DEG C of temperature in super mixer by weight, after being mixed 2 hours, filler material water
Sub-control system sequentially added modifying agent, PE wax, stearic acid, toughener at interval of 5 minutes in order less than 0.3%, was added subsequent
Continuous stirring 30 minutes, is then added linear low density polyethylene, low density polyethylene (LDPE), is granulated in double screw extruder；It squeezes out
The control of twin-screw extruder barrel temperature is in 130~140 DEG C of Ith area, 150~155 DEG C of IIth area, III area 160~165 during pelletizing
DEG C, 170~175 DEG C of IVth area, 160~165 DEG C of Vth area, 160~165 DEG C of die head；Wherein prepare the extruder spiral shell of film inner layer masterbatch
Bar revolving speed is 100~200r/min, and the extruder screw revolving speed for preparing film outer layer masterbatch is 200~500r/min；
(2) it is blow molded bag making:
Step (1) is prepared masterbatch pellet to be respectively placed in double-layer coextrusion inflation film manufacturing machine, film inner layer masterbatch is placed in A machine barrel, film outer layer
Masterbatch is placed in B machine barrel, and the control of twin-screw extruder barrel temperature is in 130~140 DEG C of Ith area, II area 170~175 during blown film
DEG C, 180~185 DEG C of IIIth area, 190~195 DEG C of IVth area, 200~205 DEG C of Vth area, 200~205 DEG C of flange, die head 200~205
DEG C, wherein A machine barrel revolving speed is 100~200r/min, and B machine barrel revolving speed is 200~500r/min, is blow molded through double-layer coextrusion inflation film manufacturing machine
Thin-film material is prepared, then through Bag Making Machine bag making.
3. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that the mistake
Calcium oxide active constituent content is 50%~60%, and mesh number is not less than 1250 mesh.
4. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that described changes
Property agent are as follows: the combination of sophorolipid, rhamnolipid, seaweed glycolipid or their arbitrary proportions.
5. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that described changes
Property agent content are as follows: the 0.5%~0.7% of calper calcium peroxide additive amount.
6. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that the increasing
Tough dose are as follows: ultra-low density polyethylene.
7. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that the line
Property low density polyethylene (LDPE) mass fraction: low density polyethylene (LDPE) mass fraction=7:3.
8. a kind of fresh transport being folded without breaking bag film of double-layer structure according to claim 1, it is characterized in that described is thin
Film bag internal layer thickness: outer layer thickness=1:1~1:3.
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| CN112793264A (en) * | 2019-11-14 | 2021-05-14 | Csir公司 | Food packaging film |
| CN114685879A (en) * | 2020-12-31 | 2022-07-01 | 上海昶法新材料有限公司 | Double-layer plastic, raw material composition, preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793264A (en) * | 2019-11-14 | 2021-05-14 | Csir公司 | Food packaging film |
| CN114685879A (en) * | 2020-12-31 | 2022-07-01 | 上海昶法新材料有限公司 | Double-layer plastic, raw material composition, preparation method and application thereof |
| CN114685879B (en) * | 2020-12-31 | 2024-02-09 | 上海昶法新材料有限公司 | Double-layer plastic, raw material composition, and preparation method and application thereof |
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